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PERCUSSION FUSE. y

Patented May 5, 1891.

(No Model.)

NQ. 451,598,- Y

VTo ait whom it may concern:

` UNITED STATES ATENT OFFICE..

t KARL Kuno immisrni'm, on wEs'rMIN-s'rna, ENGLAND.

PERoUssioiN-Fusa.

SPECIFICATION forming part of Letters Patent No. 451,598, dated May 5,1891.

Application led November l1, 1890. Serial No. 371,068. (No model.)

B e it known lthat I, KARL KUNo MALM- STROM, engineer, a subject of theKing of Sweden, residing at32 Victoria Street, in the `city ofVVestmiuster, England, have invented certain new and useful Improvementsin Percussion-Fuses, of which the following is a specification.

This inventionhas for its object improvements in' percussion-fuses.

I make these fuses in such manner that they are armed or rendered activeby the pressure ot' the powder-gases on the base of the fuse while thesame is in the gun. This pressure bends the metal of which the base ofthe fuse is composed, and by so doing releases lookin g devices andiiberates a striker, which by its forward movement when the projectilestrikes, lires the bursting charge. According to one arrangement I forma cylindrical cavity in the rear of the striker and fit within it ahollow or tubular stud fixed to the fusebody- A locking device or wirepasses through this stud and its ends enter holes in the striker. A pinabuts on this wire and also upon the base of the fuse. lVlieu the gun isfired, the

pressure :in the gun bends inward the metal forming the base of thefuse, the pin is thus thrust forward, the wire is displaced, andthestriker is liberated, ready for action.

This arrangement is represented in longi tudinal section by Figure 1 ofthe annexed drawings. Figs. 2 and 3 illustrate certain details of thismechanism. Figs. 4, 5, 6, and show7 modifications. Fig. 5 is a sectionthrough the lower part of the striker, showing the triple head of theclip engaging therewith.

in Fig. l, a.- is the fusebody, usually7 of brass, and adapted to bescrewed into the base of the projectile. b is a cap screwed in to closethe body U. in front. c is a primer or patch of fuhninate lodged in arecess in the cap h and protected in the usual manner. d is the striker.It is armed in front with the point d to strike and explode thefulminate. is a stud-piece, of hard metal, screwedinto thef use body andcarrying, the tubular stud e. f is a soft-metal wire or looking deviceinserted through holes and y in the striker and stud, respectively, andthen bent to the form shown.

bendable bottom may be part of the basebody, as in Fig. l, or may bescrewed fast into it, asin Fig. 4f, so as to remain immovable when inaction, except in so far as it is bent or deformed by the pressure.

In this arrangement the cap ZJ is dispensed with,thefulminatc-patohbeing setin arecess in the body a. The body is closed in rear by abase-plug a', screwed in. The base-plu g is deformed or bent when thegun is red and the operation is the same as in Fig. 1.

Sometimes in place of the wire and pin I employ locking devices iu theform of catches to take hold of a stem projecting from the striker.These catches are upon a piece which is thrust forward by the base ofthe fuse when it becomes bent, and so the catches are brought againstinclines within the fuse, which cause them to release their hold of thestem. This arrangement is illustrated by Fig. 5. Thestriker d has a stemd project ing from it rearward through a central hole in the piece c.The base-plug a has a spring clip 7i riveted to it. (Shown in plat byFig. 5t.) The clip has arms which tend inward. They terminatein clawswhich take hold of a head upon the stem d'2 When the gun is tired andthe base-plug is deformed, the clip is thrust against inclines e? e2 outhe piece e, and these open the clip and release the pellet; or I mayarrange the catches in such manner that the pressure of a pin moved bythe flexible base of the fuse upon a part in connection with the catchescauses them to spring apart and release the striker. This arrangement isillustrated by Fig. 1i. Here the cap b is provided witl; a crosspieceZi', on which the striker d is seated, and it is held down upon its seathy-a clip h, which inthis case consists of a narrow steel band benttwice at right IOO angles. It passesbeneath the cross has claws at itsend, whieh rest upon rneiiront of the striker'. Then the head g" olf thepin (j thrusts upon the center part of the clip, its' 5 arms separateand release the striker; or, according to another arrangementillustrated by Fig, 5,1 form a 'head g upon the pin g and eause this tobe received into a cavity within the striker` (L. This pin g, so long asit retains the position in which it is originally placed, llooks thestriker fast Within the fusebody; but when the base of the fusebody is ybent by the pressure of 'the powder-gases upon it 'the pin is drivenforward, and its head g no longer prevents the striker moving so 'far asto bring iis point CZ into contact with the patch of fulrninate e, bywhich the bursting' charge ot' the projectile is ignited.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to beperform'ed, I would statethat I am aware that fuses have before been mad e in which the re. leaseof the striker has been obtained by the pressn re ofthe powdengases inthe gun-chamn LleitefsfjPatem Non-451,598..

following corrention:7

s l'revcord of the 1 I in Letters 'Signedg eountersiried`,. .sealedthis' "Maj",-

ber, causingr the movement of a plug in a.' eaviiy into which it isiii-ted; but with this arrangement there is always some danger o thepassage of the powder-gases into the interior ol' the fuse, and thefuse-case not being 3o hermetically-closed is in other respectsobjeetionable.

lVhat l claim is i. A percussioirfuse formed with abendable or yieldinobase in operative connection 35 with locking devices, which, when thegun is ii red, are released and set free, and a striker to ignite Jshefnlmin'ate or primer, substantially as described.

2. A. percussion-fuse having a bendable or 4o yielding oase or end inoperative connection with a wire which normally holds a striker awayfroma primer, and Which,vwhen the gun is fired, is released to set free thestriker to ignite the fnlminate or primer, substantially 43 asdescribed.

y KARL KUN() MATAISTROM.v

Witnesses:

'HERBERT V. JORDAN,

F, A. NOL.

thev application-ofarlKn-noMelrostrinifofgwestrninster,England,'Rian"improvel erc'ns'sion-Fusesj?an error appears/inthe printed speciiication rquiringfthe g line 37,page 2, therclause farev released andlsetfree.v

v'Patenti should with thisoorrection-therenrithat the saine mayconformitothe m1318911 ,1, ,oXaUsBussEYr, Assistant'Secretary-.oftheInterior:

Correction in Leiters Patent No. 451,598.

lt is hereby certified that in Letters Patent No. 451,598, granted May5, 1891, uj the application of Karl Kuno Malmstrin, of Westminster,England, for an impr( ment in Percussion-Fuses, an error appears in theprinted specification requiring following correction, Viz.: In line 37,page 2, the clause are released and set i and a striker;7 shouldl readare released, cmd set free a striker and that the Let i?atent should beread with this correction therein that the same may conform to recordot' the ease in the Patent Office.

Signed, eountersigned, and sealed this 12th day of May, A. I). 1891.

[SEAL] CYRUS BUSSEY,

` Assistant Secretary ofthe Inter Countersgned:

C. E. MITCHELL,

Commissioner of Patents.

